Jonathan mills



J. MILLS.- AIRIINDUGTION APPARATUS POR FURNAGES; No. 527,615.

Patented Oct. 16, 1894.

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JONATHAN MILLS, OF NEW YORK, ASSIGNOR OE TWo-THIRDS To EVER- ETTH. CONVERSE, OE BROOKLYN, AND WILL E. STEELE, OE NEW YORK, N. Y.

AIR-INDUCTION APPARATUS FOR FURNACES.`

SPECIFICATION forming part of Letters Patent No. 527,615, dated October 16, 1894.

Application tiled March 15, 1894.

To all whom it may concern:

Be it known that I, JONATHAN MILLS, a citi zen of the United States, residing in the city, county, and State of New York, have invented certain new and usefullmprovements in Air- Induction Apparatus for Furnaces, of which the following is a specification.

My invention relates to means for facilitating combustion in furnaces andL particularly to that class of devices for the purpose wherein a jet'of steam is employed to induce a current of air to flow to the point of ignition Where the constituent gases of the steam and air combine with the carbon of the fuel.

The object of the present invention is to produce a simple air-induction device or apparatus having high capacity with facility of access for adjustmenhiand one in which the disagreeable noise attendant on the use of such devices is in a good degree modified.

The invention 'will be fully described hereinafter and its novel features carefully defined in the claims. Y

In the accompanying drawings- Figure l is a longitudinal mid-section of an air-induction apparatus embodying my invention. Fig. 2 is an end view of the same. Fig. 3 is a transverse section at line 3, 3, in Fig. l. Fig. 4 comprises an end view and a longitudinal section of one of the steam-jet nozzles, drawn to a larger scale than the principal views. Fig. 5 comprises two views of other forms of steam-j et nozzles which will be hereinafter described.

A is the main tube of the apparatus or device. This tube is preferably cylindrical, but not necessarily so. It may be of cast iron and should have at its outer end (at the left in Fig. l) a flange, a.

B is the induction nozzle, which may also be of cast iron. This nozzle has an annular chamber, l?, formed in its wall and a flange, bx, at its outer end, which when the nozzle is inserted "in the tube A, applies itself to the flange a., to which it is secured by readily re-v movable fastenings. As here shown these fastenings consist of bolts and wing-nuts, b.

In the inner end of the nozzle B are set a series of steam-jet nozzles, C, which commu- Serial No. 503,764. (No model.)

meat@ with the' @ham-ber b. six of these steamjet nozzles, are shown herein, equally spaced and forming a ring, but the number need not be limited'to six. Steam is admitted to the illustrated in Fig. 4. On a short section of pipe or tubing,'c, is screwed a cap, cx, in which is formed a central aperture, c', and cross slits, c2, for the escape of the steam.- Over this cap cx, is fitted aregister cap, c3, which is held in place by screws, c, which engage a circumferential groove in the inner cap c". This register cap has in it a central aperture which co-incides with that in the cap cx, and four apertures, c5, which may be brought to register with the slits in the cap cx; but by rotation of the register cap the slits in the cap cX may be Ypartly or wholly closed. The oentral aperture, however, will remain o pen at all times. The screws c4, serve to lix the register cap in position when adjusted.

The liange and Wall of the tube A are cut away at the point where the nipple b2, enters, so that, when the induction nozzle B is released it may be drawn out to facilitate the adjustment or repair of the steam-j et nozzles.

To strengthen the hollow wall of the nozzle B it may have cast in it stays, b3, as seen in Fig. 1.`

f lt will be seen by inspection that the airpassage, through the nozzle B, has a much smaller area in cross-section than the passage,

y, in the pipe A, beyond the nozzle Bthrough which the steam and air, combined, flows on its way to the point of combustion. This construction provides for the necessary expansion of the fluids at the pointwhere the steam and air ycommingle.

The nozzles illustrated in Fig. 5 may be employed, especially Where adjustment of the aj utage or outletis not desired. One of these nozzles has only a central opening or aperture and the other a simple transverse slit, which may be quite narrow. Other forms of aj utages may be employed.

The leading general feature of the const-ruction is the relatively contracted air-passage opening concentrically into the larger passage y, at the point where the ring of steam jets is situated, the said ring of jets surrounding the mouth of the airinlet or passage and occupying the annular space formed by the oset, as clearly shown. The construction which enables the induction nozzle to be readily removed without disturbing the main tube, which will be secured in position, and the adj ustability of the steam aj utagcs, are also important features of the apparatus.

The passage 0c may be extended to, or alittle beyond the ends of the steam-jet nozzles C, as indicated in dotted lines at in Fig.1. This will serve to lessen the noise still more than the construction described.

Having thus described my invention, I claiml. An air-induction apparatus for furnaces having an air-inlet w, of relatively restricted diameter, opening at its mouth into a passage fg, of larger diameter than the air-inlet, an annular offset being thus formed at and laterally exterior to the mouth of the air-inlet, and steam-jet nozzles arranged at said oset about the mouth of the air-inlet and in the passage y, whereby an enlarged expansion chamber is formed from and beyond the point where the steam and air commingle.

2. An air-induction apparatus for furnaces, comprising a main tube having a passage y, an induction nozzle having an air-inlet or passage m, of less diameter than the passage fy and arranged concentrically therewith, and a series of steam-jets arranged within the passage y and around the mouth of the passage substantially as set forth.

3. An air-induction apparatus for furnaces, comprising a main tube, an air-induction nozzle B, fitting into said tube and having a chamber I) in its wall and an inlet for steam to said chamber, and a series of steam jets set in the inner end of the induction nozzle around the air-passage therethrough, substantially as set forth.

4. An air-induction apparatus for furnaces, comprising atubular induction nozzle having an air-passage and steam jets O arranged around the mouth of said passage, and an inclosing tube about said induction nozzle, as set forth.

5. In an air-induction apparatus for furnaces, the combination with the main tube A, provided with a flange a at its outer end, of the induction nozzle B, adapted to fit into the tube A and having a flange bx, and means for detachably securing the flange bx to the flange a, whereby the ready removal of the induction nozzle is facilitated, substantially as set forth.

6. A steam-jet nozzle for an air-induction apparatus, having a cap with aj utages for the steam and a rotatable register cap to control said ajutages, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

JONATHAN MILLS. W'itnesses:

HENRY CONNETT, JAs. KING DUFFY. 

